摘要
为了消除连铸钢坯的表面缺陷，提出了在铸型外部加间断高频交流磁场的铸造方法.用液体Ga作为钢液的模拟物，借助于激光测位仪研究了外加间断磁场对铸型内液体金属运动的影响.通过Sn的连续铸造模拟实验，探讨了弯月面波动和铸坯的表面质量之间的关系.结果表明，外加间断磁场能控制铸型内液体金属的运动，改善铸坯的表面质量控制弯月面的运动，可使铸坯表面形成和间断频率fi相应的条纹.当fi接近于实验系统的固有频率时，电磁场抑制液面运动的效果最好，铸坯的表面质量最佳.
In order to eliminate the surface defects of continuously casting metals, a casting process imposing an intermittent high frequency magnetic field from the outside of the mold is developed. Effect of the intermittent magnetic field on the motion of a molten gallium in a continuously casting mold, used as the simulator of a molten steel, was investigated by a laser level sensor. The relation between meniscus motion and surface quality was studied by continuously casting tin. It is found that the motion of the melt in the mold can be suppressed and the surface quality of the ingot can be improved by imposing intermittent magnetic field.It is noticed that the surface ripples corresponding to intermittent frequency, fi was formed on the ingot surface, and when fi is close to the intrinsic frequency of the experimental system, the effect of imposing magnetic field is the best.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1997年第5期524-528,共5页
Acta Metallurgica Sinica
关键词
振纹
铸坯
表面质量
磁场
金属液
连铸
铸型
continuous casting
oscillation mark
surface quality of ingot
electromagnetic field
